Any nonconforming lot or building existing at the time of adoption of this chapter may have a building permit issued for a permitted use without an appeal to the Board of Adjustment, provided that the building coverage, parking and yard requirements are not exceeded or diminished, as the case may be, by more than 20%.

Whenever land has been dedicated or conveyed to the municipality by the owner of a lot existing at the effective date of this chapter and such dedication or conveyance was done in order to meet the minimum street width requirements or to implement the Official Map or Master Plan, the Building Inspector shall not withhold a building and/or occupancy permit when lot depth and/or lot area was rendered substandard due to such dedication and where the owner has no adjacent lands to meet the minimum lot requirements.

For corner lots (as defined in § 188-4), all property lines along roadways and/or rights-of-way will be considered front property lines and will have the required setback for a front yard per the zone in which it is located (except as otherwise provided). The following will determine the designation of the remaining lot lines:

Any principal or accessory building located on a corner lot shall have a minimum setback from both street lines equal to the required front yard and shall not interfere with any required sight triangle. Nothing in this section shall prohibit the placement of an accessory structure within the practical side and rear yards even if said location is between the principal structure and property line, so long as the front yard setback and any other applicable setback requirements are met. Practical rear and side yards are determined by the architectural front of the house.